恳请csdn的高手们帮帮忙，Hibernate的session就是打不开？？？！！！
我用的是 Tomcat6.0 + Java +SqlServer2005 + Hibernate2.1.8 
我在Action里，执行完数据库操作，就用HibernateUtil.closeSession()关了session。
但是！！！，调用sessionFactory.openSession()重新打开session，
却出现
net.sf.hibernate.HibernateException: Session is closed

at net.sf.hibernate.impl.SessionImpl.connection(SessionImpl.java:3339)
at net.sf.hibernate.impl.BatcherImpl.prepareQueryStatement(BatcherImpl.java:67)
at net.sf.hibernate.loader.Loader.prepareQueryStatement(Loader.java:784)
at net.sf.hibernate.loader.Loader.doQuery(Loader.java:269)
at net.sf.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:138)
at net.sf.hibernate.loader.Loader.doList(Loader.java:1063)
at net.sf.hibernate.loader.Loader.list(Loader.java:1054)
at net.sf.hibernate.hql.QueryTranslator.list(QueryTranslator.java:854)
at net.sf.hibernate.impl.SessionImpl.find(SessionImpl.java:1554)
at net.sf.hibernate.impl.QueryImpl.list(QueryImpl.java:49)
at navi_3g.common.CommonDao.getInt(CommonDao.java:93)
at navi_3g.db.dao.BUNRUI1Dao.getBUNRUI1(BUNRUI1Dao.java:14)
at navi_3g.action.Class3Action.execute(Class3Action.java:121)
at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:425)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:228)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:449)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at navi_3g.filters.CloseSessionFilter.doFilter(CloseSessionFilter.java:53)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at navi_3g.filters.SessionFilter.doFilter(SessionFilter.java:35)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at navi_3g.filters.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:75)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:849)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:454)
at java.lang.Thread.run(Thread.java:619)

到底应该怎么做好，真的疯掉了，向大家求救！！！



------解决方案--------------------
private static final SessionFactory sessionFactory;
public static long count = 0;
public static long count1 = 0;